Doesn't matter a microiota. They agreed. They must have been fucking stupid, but they agreed.
If I wanted to bet you a fuckzillion pounds on a coin toss (as long as we used my special coin) wouldn't you at least be a teeny bit suspicious?
And the cards were not marked (as in, the gambler tinkered with them). They were stock products, and were faulty. If the casino has a claim, it's against the manufacturer.
Oh, hang on. That's liability laws, which is regulation, which is communism, which is socialised healthcare death panels and compulsory homosexuality and area 21.